You can summon Ashen Knight Boyd behind a pillar where you find the fog door.

Freja herself has 3 main attacks to watch out for. The first you likely saw, and is the giant beam. It is easy to dodge, but can be devastating when it hits. The second is a stomping attack, when you are near her feet she will pound them on the ground. The final happens when you are close to either head, she will rear her head back, open her mouth and then lunge forward to grab you. Dodge quickly to her side to ensure you don't get grabbed. Additionally, if you stay close for long enough, she will leap into the air to get away.

The first thing players need to take note of as they enter the fight, is the additional spiders. Once inside, you have enough time to have one swing at the spiders in front of you, players should then sprint along the outside of the map and try to take out the smaller spiders. Having a bow is great for this, or even a weak soul arrow spell. If you chose to summon Ashen, the fight becomes considerably easier. He will deal with the first batch of spiders, as well as keeping Frejas attention. Once the smaller spiders have been dealt with, you can move on to the large one, who has likely been blasting her giant beam while you dealt with the small ones.

The most important thing to know about Freja is that she has two heads on either end, her heads are the only spots you can actually damage, and they are each targetable!

Combat itself should be simple. Dress light so you can easily dodge, get in close and swing at her face 1-2 times, then dodge to the side of her body before she grabs you, rinse and repeat. Alternatively you can try to stay further back, running in to hit her and escaping when she attacks, and running in while she fires the huge beam, and then dodge away. Keep in mind that webs are everywhere slowing your movement, and she can also spit webs at you to slow you down, so the lighter you dress, the better.

This fight can go much easier for casters and archers. Once the little spiders have been dealt with, your only concern will be the large beam. Simply dodge it then fire, and repeat this process until the arachnid goes down. Pyromancy will do excellent damage against her, but Soul Arrows have a much greater range, allowing for safer casting.